Sunday, October 15, 2017

Home Automation System Circuit Using a Simple Android App Via Bluetooth to Arduino

Electronic Kit School. - Smartphone in this time, not only used to playing the game, selfie, and chatting with social media only. But, now smartphone also can be used to control our home electric appliance like lamp, fan, and others. 

There are many electronic design circuit to build home electric appliance control using Android App in this time. One of the circuit design in this time is use the bluetooth to control home electric appliance or called with home automation system using Android App and Arduino.

The main component to build this system is Arduino Uno, Bluetooth module, relay module, and power supply unit. In this time, beside we will show you the circuit, here we also will show you component part and global description about this circuit.


Home Automation System Circuit using a Simple Android App (Source:

Component Parts
  1. Arduino Uno Module
  2. Relay Module
  3. Bluetooth Module
  4. Power Supply Module

Circuit like in Figure 1 above show you about the Home Automation System Circuit Using a Simple Android App Via Bluetooth to Arduino. From Electronicsforu site describe that the home automation circuit is built around an Arduino Uno board, Bluetooth module HC-05 and a 3-channel relay board. The number of channels depends on the number of appliances you wish to control. Arduino Uno is powered with a 12V DC adaptor/power source. The relay module and Bluetooth module can be, in turn, powered using a board power supply of Arduino Uno.

Bluetooth module used in this project is HC-05 (Fig. 4), which supports master and slave mode serial communication (9600-115200 bps) SPP and UART interface. Using these features it can communicate with other Bluetooth-enabled devices like mobile phones, tablets and laptops. The module runs on 3.3V to 5V power supply.

A relay allows you to turn on or turn off a circuit using voltage and/or current much higher than what Arduino could handle. Relay provides complete isolation between the low-voltage circuit on Arduino side and the high-voltage side controlling the load. It gets activated using 5V from Arduino, which, in turn, controls electrical appliances like fans, lights and air-conditioners.

Arduino is an open source electronics prototyping platform based on flexible, easy-to-use hardware and software. It is intended for artists, designers, hobbyists and anyone interested in creating interactive objects or environments.


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